 The school provides both primary and secondary education between its Junior and Senior Schools.In 2016, the School built a new building called the Girdwood Building which is home to Transitus, English, Guidance and Modern and Ancient Languages

St Columba's was founded in 1897 at Duchal Road where it is still located.The preparatory school at St Columba's was formerly located at Shieldhall on Bridge of Weir Road.